Thermal environment in a confined space of high-rise building with split air conditioning system

2004 ◽  
Vol 39 (7) ◽  
pp. 817-823 ◽  
Author(s):  
H. Xue ◽  
S.K. Chou ◽  
X.Q. Zhong
Keyword(s):  
Air Conditioning ◽  
Thermal Environment ◽  
Confined Space ◽  
Air Conditioning System ◽  
High Rise ◽  
High Rise Building

Numerical Simulation for Outdoor Thermal Environment of High-Rise Building With Air-Conditioner

2010 ◽  
Author(s):  
Zhen Zhang ◽  
Lige Tong ◽  
Li Wang
Keyword(s):  
Solar Radiation ◽  
Thermal Environment ◽  
Installation Space ◽  
Air Conditioner ◽  
Confined Space ◽  
Steady State Condition ◽  
Factors Affecting ◽  
High Rise ◽  
High Rise Building ◽  
Heat Released

A large number of split-type air conditioner are widely used in high-rise residential or office buildings in China and the outdoor units of air-conditioner are often installed at the sidewalls or on the roofs in the confined space of a high-rise building. The factors affecting the performance of air-conditioner are the solar radiation, the heat released from the outdoor units, the ventilation of the confined installation space of a building where the outdoor units are installed and so on, which are investigated in this study. The air flow and temperature distribution under steady-state condition near the two outdoor units installed on the same storey in a building are simulated by software FLUENT, in which the porous model and DO radiation model are used. The optimum installation distance from the supporting wall is obtained. The average temperature of the exit surface without wind is 1.18% more than that with wind. The results show that the heat released from the outdoor units and the ventilation of the confined installation space where the outdoor units are installed are the main factors affecting the thermal environment in the confined installation space; The influence of the solar radiation can be neglected.

scholarly journals Simulation and experimental study of phase change cooling and heating wall radiation air conditioning system

2020 ◽  
Vol 143 ◽  
pp. 02044
Author(s):  
Gao Chunxue ◽  
Wu Songlin ◽  
Lang Junqian ◽  
Liu Qiuxin
Keyword(s):  
Phase Change ◽  
Thermal Performance ◽  
Air Conditioning ◽  
Field Experiments ◽  
Thermal Environment ◽  
Operating Conditions ◽  
Operation Condition ◽  
Heating Wall ◽  
Air Conditioning System ◽  
Winter Operation

This paper presents a case study of phase change cooling and heating wall radiant (PC-CHWR) air conditioning system application in an energy-saving renovation project in a laboratory in Wuhan, Hubei province in China. To test the thermal performance of the system, the PHOENICS software was utilized to simulate and analyse the indoor thermal environment in the laboratory under both winter and summer operating conditions. In addition, field experiments were also conducted under winter operation condition. By comparing the results between numerical simulation and field experiment, it is found that thermal performance of the PC-CHWR air conditioning system evaluated by these two evaluation methods are quite match. Moreover, the results also show that the PC-CHWR system can meet the cooling and heating load of the building within the acceptable range.

scholarly journals Evaluation of Thermal Behavior of the Skeleton in a Green Building with the Aid of TABS

2019 ◽  
Vol 111 ◽  
pp. 01085
Author(s):  
Hiroshi Muramatsu ◽  
Tatsuo Nobe
Keyword(s):  
Heat Flux ◽  
Thermal Behavior ◽  
Air Conditioning ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
Concrete Slab ◽  
Ventilation System ◽  
Office Building ◽  
Air Conditioning System ◽  
Indoor Thermal Environment

In this study, an office building in Japan that incorporates energy-saving features and environmental technologies was investigated. This office building features a green façade, natural ventilation, a concrete slab with no suspended ceilings, and thermo-active building systems. Two airconditioning systems were installed in this building—a ceiling radiation air-conditioning system and a whole floor-blow off air conditioning system. In addition, a natural ventilation system was installed. We surveyed the heat flux of the ceiling surface and indoor thermal environment of this building from 2015 through 2016. The ceiling using the heat storage amount of concrete maintains a constant temperature in the workplace during as well as after office hours. We also performed detailed measurements of the heat flux of the ceiling surface and indoor thermal environment in the summer of 2017. The results showed that the ceiling radiation air-conditioning system provided a stable thermal environment. Furthermore, we report that making use of the thermal behavior of the skeleton improved the operation of the ceiling radiation airconditioning system.

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